*/
/* Boehm, July 31, 1995 5:02 pm PDT */
-#ifdef GC_GCJ_SUPPORT
-
/*
* This is an allocator interface tuned for gcj (the GNU static
* java compiler).
#include "gc_gcj.h"
#include "private/dbg_mlc.h"
+#ifdef GC_GCJ_SUPPORT
+
GC_bool GC_gcj_malloc_initialized = FALSE;
int GC_gcj_kind; /* Object kind for objects with descriptors */
void GC_init_gcj_malloc(int mp_index, void * /* really GC_mark_proc */mp)
{
register int i;
+ GC_bool ignore_gcj_info;
DCL_LOCK_STATE;
GC_init(); /* In case it's not already done. */
return;
}
GC_gcj_malloc_initialized = TRUE;
+ ignore_gcj_info = (0 != GETENV("GC_IGNORE_GCJ_INFO"));
+# ifdef CONDPRINT
+ if (GC_print_stats && ignore_gcj_info) {
+ GC_printf0("Gcj-style type information is disabled!\n");
+ }
+# endif
+ GC_ASSERT(GC_mark_procs[mp_index] == (GC_mark_proc)0); /* unused */
GC_mark_procs[mp_index] = (GC_mark_proc)mp;
if (mp_index >= GC_n_mark_procs) ABORT("GC_init_gcj_malloc: bad index");
/* Set up object kind gcj-style indirect descriptor. */
- GC_gcjobjfreelist = (ptr_t *)
- GC_INTERNAL_MALLOC((MAXOBJSZ+1)*sizeof(ptr_t), PTRFREE);
- if (GC_gcjobjfreelist == 0) ABORT("Couldn't allocate GC_gcjobjfreelist");
- BZERO(GC_gcjobjfreelist, (MAXOBJSZ+1)*sizeof(ptr_t));
- GC_gcj_kind = GC_n_kinds++;
- GC_obj_kinds[GC_gcj_kind].ok_freelist = GC_gcjobjfreelist;
- GC_obj_kinds[GC_gcj_kind].ok_reclaim_list = 0;
- GC_obj_kinds[GC_gcj_kind].ok_descriptor =
- (((word)(-MARK_DESCR_OFFSET - GC_INDIR_PER_OBJ_BIAS)) | GC_DS_PER_OBJECT);
- GC_obj_kinds[GC_gcj_kind].ok_relocate_descr = FALSE;
- GC_obj_kinds[GC_gcj_kind].ok_init = TRUE;
+ GC_gcjobjfreelist = (ptr_t *)GC_new_free_list_inner();
+ if (ignore_gcj_info) {
+ /* Use a simple length-based descriptor, thus forcing a fully */
+ /* conservative scan. */
+ GC_gcj_kind = GC_new_kind_inner((void **)GC_gcjobjfreelist,
+ (0 | GC_DS_LENGTH),
+ TRUE, TRUE);
+ } else {
+ GC_gcj_kind = GC_new_kind_inner(
+ (void **)GC_gcjobjfreelist,
+ (((word)(-MARK_DESCR_OFFSET - GC_INDIR_PER_OBJ_BIAS))
+ | GC_DS_PER_OBJECT),
+ FALSE, TRUE);
+ }
/* Set up object kind for objects that require mark proc call. */
- GC_gcjdebugobjfreelist = (ptr_t *)
- GC_INTERNAL_MALLOC((MAXOBJSZ+1)*sizeof(ptr_t), PTRFREE);
- if (GC_gcjdebugobjfreelist == 0)
- ABORT("Couldn't allocate GC_gcjdebugobjfreelist");
- BZERO(GC_gcjdebugobjfreelist, (MAXOBJSZ+1)*sizeof(ptr_t));
- GC_gcj_debug_kind = GC_n_kinds++;
- GC_obj_kinds[GC_gcj_debug_kind].ok_freelist = GC_gcjdebugobjfreelist;
- GC_obj_kinds[GC_gcj_debug_kind].ok_reclaim_list = 0;
- GC_obj_kinds[GC_gcj_debug_kind].ok_descriptor =
- GC_MAKE_PROC(mp_index, 1 /* allocated with debug info */);
- GC_obj_kinds[GC_gcj_debug_kind].ok_relocate_descr = FALSE;
- GC_obj_kinds[GC_gcj_debug_kind].ok_init = TRUE;
+ if (ignore_gcj_info) {
+ GC_gcj_debug_kind = GC_gcj_kind;
+ GC_gcjdebugobjfreelist = GC_gcjobjfreelist;
+ } else {
+ GC_gcjdebugobjfreelist = (ptr_t *)GC_new_free_list_inner();
+ GC_gcj_debug_kind = GC_new_kind_inner(
+ (void **)GC_gcjdebugobjfreelist,
+ GC_MAKE_PROC(mp_index,
+ 1 /* allocated with debug info */),
+ FALSE, TRUE);
+ }
UNLOCK();
ENABLE_SIGNALS();
}
#define GENERAL_MALLOC_IOP(lb,k) \
(GC_PTR)GC_clear_stack(GC_generic_malloc_inner_ignore_off_page(lb, k))
+/* We need a mechanism to release the lock and invoke finalizers. */
+/* We don't really have an opportunity to do this on a rarely executed */
+/* path on which the lock is not held. Thus we check at a */
+/* rarely executed point at which it is safe to release the lock. */
+/* We do this even where we could just call GC_INVOKE_FINALIZERS, */
+/* since it's probably cheaper and certainly more uniform. */
+/* FIXME - Consider doing the same elsewhere? */
+static void maybe_finalize()
+{
+ static int last_finalized_no = 0;
+
+ if (GC_gc_no == last_finalized_no) return;
+ if (!GC_is_initialized) return;
+ UNLOCK();
+ GC_INVOKE_FINALIZERS();
+ last_finalized_no = GC_gc_no;
+ LOCK();
+}
+
/* Allocate an object, clear it, and store the pointer to the */
/* type structure (vtable in gcj). */
/* This adds a byte at the end of the object if GC_malloc would.*/
opp = &(GC_gcjobjfreelist[lw]);
LOCK();
op = *opp;
- if( EXPECT(op == 0, 0)) {
+ if(EXPECT(op == 0, 0)) {
+ maybe_finalize();
op = (ptr_t)GENERAL_MALLOC((word)lb, GC_gcj_kind);
if (0 == op) {
UNLOCK();
GC_words_allocd += lw;
}
*(void **)op = ptr_to_struct_containing_descr;
+ GC_ASSERT(((void **)op)[1] == 0);
UNLOCK();
} else {
LOCK();
+ maybe_finalize();
op = (ptr_t)GENERAL_MALLOC((word)lb, GC_gcj_kind);
if (0 == op) {
UNLOCK();
{
GC_PTR result;
- /* We clone the code from GC_debug_gcj_malloc, so that we */
- /* dont end up with extra frames on the stack, which could */
+ /* We're careful to avoid extra calls, which could */
/* confuse the backtrace. */
LOCK();
+ maybe_finalize();
result = GC_generic_malloc_inner(lb + DEBUG_BYTES, GC_gcj_debug_kind);
if (result == 0) {
UNLOCK();
LOCK();
op = *opp;
if( EXPECT(op == 0, 0) ) {
+ maybe_finalize();
op = (ptr_t)GC_clear_stack(
GC_generic_malloc_words_small_inner(lw, GC_gcj_kind));
if (0 == op) {
/* dont end up with extra frames on the stack, which could */
/* confuse the backtrace. */
LOCK();
+ maybe_finalize();
result = GC_generic_malloc_inner(lb + DEBUG_BYTES, GC_gcj_debug_kind);
if (result == 0) {
UNLOCK();
opp = &(GC_gcjobjfreelist[lw]);
LOCK();
if( (op = *opp) == 0 ) {
+ maybe_finalize();
op = (ptr_t)GENERAL_MALLOC_IOP(lb, GC_gcj_kind);
# ifdef MERGE_SIZES
lw = GC_size_map[lb]; /* May have been uninitialized. */
*(void **)op = ptr_to_struct_containing_descr;
UNLOCK();
} else {
+ LOCK();
+ maybe_finalize();
op = (ptr_t)GENERAL_MALLOC_IOP(lb, GC_gcj_kind);
if (0 != op) {
*(void **)op = ptr_to_struct_containing_descr;
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